<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">

<title>module SingleForwardable - forwardable: Ruby Standard Library Documentation</title>


<script src="./js/navigation.js" defer></script>
<script src="./js/search.js" defer></script>
<script src="./js/search_index.js" defer></script>
<script src="./js/searcher.js" defer></script>
<script src="./js/darkfish.js" defer></script>

<script src="./js/jquery-3.2.0.min.js"></script>

<script src="./js/vue.min.js"></script>
<script src="./js/js.cookie.min.js"></script>

<link href="./css/fonts.css" rel="stylesheet">
<link id='rdoccss' href="./css/rdoc.css" rel="stylesheet">
<link href="./css/carbon17.css" rel="stylesheet">

<script type="text/javascript">
  var rdoc_rel_prefix = "./";
  var index_rel_prefix = "./";
  var darkModeCsseHref = "./css/rdoc-dm.css"
  var defaultModeCssHref = "./css/rdoc.css"
  // var cssDarkmode = Cookies.get('darkmode');
  
  if( Cookies.get("darkmode") == "true") {
	$('#rdoccss').attr("href", darkModeCsseHref);
}

//  https://cssdeck.com/blog/simple-jquery-stylesheet-switcher/

document.write('<style type="text/css">body{display:none}</style>');

</script>


</head>
<body id="top" role="document" class="module">
  <!-- this is class.html -->

  <div id='actionbar' >
    <div class='wrapper mdiv'>
      <ul class='grids g0'></ul>
    </div> 
    <!-- VERSION HEADER for 3.3.0.preview2 NOT FOUND -->
  </div> <!-- end action bar -->

  <div class='wrapper hdiv'>

    


    <nav id='vapp' role="navigation">
    <div id="project-navigation">
      <div id="home-section" role="region" title="Quick navigation" class="nav-section">
  <h2><a href="./index.html" rel="home">Home</a></h2>

  <div id="table-of-contents-navigation"  >
    <a href="./table_of_contents.html#pages">Pages</a>
    <a href="./table_of_contents.html#classes">Classes</a>
    <a href="./table_of_contents.html#methods">Methods</a>
  </div>
</div>

      <div id="search-section" role="search" class="project-section initially-hidden">
  <form action="#" method="get" accept-charset="utf-8">
    <div id="search-field-wrapper">
      <input id="search-field" role="combobox" aria-label="Search"
             aria-autocomplete="list" aria-controls="search-results"
             type="text" name="search" placeholder="Search" spellcheck="false"
             title="Type to search, Up and Down to navigate, Enter to load">
    </div>

    <ul id="search-results" aria-label="Search Results"
        aria-busy="false" aria-expanded="false"
        aria-atomic="false" class="initially-hidden"></ul>
  </form>
</div>

    </div>


    

    <button id='toggleThing' @click="toggleNav()" >Show/hide navigation</button>
    <div :class="isOpen ? 'block' : 'hidden' " id='toggleMe'>
      <div id="class-metadata">
        
        
        
        
        
<!-- Method Quickref -->
<div id="method-list-section" class="nav-section">
  <h3>Methods</h3>

  <ul class="link-list" role="directory">
    <li ><a href="#method-i-def_delegator">#def_delegator</a>
    <li ><a href="#method-i-def_delegators">#def_delegators</a>
    <li ><a href="#method-i-def_single_delegator">#def_single_delegator</a>
    <li ><a href="#method-i-def_single_delegators">#def_single_delegators</a>
    <li ><a href="#method-i-delegate">#delegate</a>
    <li ><a href="#method-i-single_delegate">#single_delegate</a>
  </ul>
</div>

      </div>
     </div>
    </nav>


    <div id='extraz'><div class='adzbox-index'  >
      
     </div>         
    </div>

    <main role="main" aria-labelledby="module-SingleForwardable">
    <h1 id="module-SingleForwardable" class="module">
      module SingleForwardable
    </h1>

    <section class="description">
    
<p><a href="SingleForwardable.html"><code>SingleForwardable</code></a> can be used to setup delegation at the object level as well.</p>

<pre class="ruby"><span class="ruby-identifier">printer</span> = <span class="ruby-constant">String</span>.<span class="ruby-identifier">new</span>
<span class="ruby-identifier">printer</span>.<span class="ruby-identifier">extend</span> <span class="ruby-constant">SingleForwardable</span>        <span class="ruby-comment"># prepare object for delegation</span>
<span class="ruby-identifier">printer</span>.<span class="ruby-identifier">def_delegator</span> <span class="ruby-string">&quot;STDOUT&quot;</span>, <span class="ruby-string">&quot;puts&quot;</span>  <span class="ruby-comment"># add delegation for STDOUT.puts()</span>
<span class="ruby-identifier">printer</span>.<span class="ruby-identifier">puts</span> <span class="ruby-string">&quot;Howdy!&quot;</span>
</pre>

<p>Also, <a href="SingleForwardable.html"><code>SingleForwardable</code></a> can be used to set up delegation for a Class or Module.</p>

<pre class="ruby"><span class="ruby-keyword">class</span> <span class="ruby-constant">Implementation</span>
  <span class="ruby-keyword">def</span> <span class="ruby-keyword">self</span>.<span class="ruby-identifier ruby-title">service</span>
    <span class="ruby-identifier">puts</span> <span class="ruby-string">&quot;serviced!&quot;</span>
  <span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span>

<span class="ruby-keyword">module</span> <span class="ruby-constant">Facade</span>
  <span class="ruby-identifier">extend</span> <span class="ruby-constant">SingleForwardable</span>
  <span class="ruby-identifier">def_delegator</span> <span class="ruby-value">:Implementation</span>, <span class="ruby-value">:service</span>
<span class="ruby-keyword">end</span>

<span class="ruby-constant">Facade</span>.<span class="ruby-identifier">service</span> <span class="ruby-comment">#=&gt; serviced!</span>
</pre>

<p>If you want to use both <a href="Forwardable.html"><code>Forwardable</code></a> and <a href="SingleForwardable.html"><code>SingleForwardable</code></a>, you can use methods def_instance_delegator and <a href="SingleForwardable.html#method-i-def_single_delegator"><code>def_single_delegator</code></a>, etc.</p>

    </section>

      <section id="5Buntitled-5D" class="documentation-section">





                <section id="public-instance-5Buntitled-5D-method-details" class="method-section">
                <header>
                <h3>Public Instance Methods</h3>
                </header>

                  <div id="method-i-def_delegator" class="method-detail method-alias">
                            <div class="method-heading">
                              <span class="method-name">def_delegator</span><span
                                class="method-args">(accessor, method, ali = method)</span>
                            </div>

                            <div class="method-description">
                              

                            </div>


                            <div class="aliases">
                              Alias for: <a href="SingleForwardable.html#method-i-def_single_delegator">def_single_delegator</a>
                            </div>
                          </div>

                  <div id="method-i-def_delegators" class="method-detail method-alias">
                            <div class="method-heading">
                              <span class="method-name">def_delegators</span><span
                                class="method-args">(accessor, *methods)</span>
                            </div>

                            <div class="method-description">
                              

                            </div>


                            <div class="aliases">
                              Alias for: <a href="SingleForwardable.html#method-i-def_single_delegators">def_single_delegators</a>
                            </div>
                          </div>

                  <div id="method-i-def_single_delegator" class="method-detail ">
                      <div class="method-heading">
                        <span class="method-callseq">
                          def_single_delegator(accessor, method, new_name=method)
                              </span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>Defines a method <em>method</em> which delegates to <em>accessor</em> (i.e. it calls the method of the same name in <em>accessor</em>).  If <em>new_name</em> is provided, it is used as the name for the delegate method. Returns the name of the method defined.</p>

                              <div class="method-source-code" id="def_single_delegator-source">
            <pre><span class="ruby-comment"># File forwardable.rb, line 310</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">def_single_delegator</span>(<span class="ruby-identifier">accessor</span>, <span class="ruby-identifier">method</span>, <span class="ruby-identifier">ali</span> = <span class="ruby-identifier">method</span>)
  <span class="ruby-identifier">gen</span> = <span class="ruby-constant">Forwardable</span>.<span class="ruby-identifier">_delegator_method</span>(<span class="ruby-keyword">self</span>, <span class="ruby-identifier">accessor</span>, <span class="ruby-identifier">method</span>, <span class="ruby-identifier">ali</span>)

  <span class="ruby-identifier">ret</span> = <span class="ruby-identifier">instance_eval</span>(<span class="ruby-operator">&amp;</span><span class="ruby-identifier">gen</span>)
  <span class="ruby-identifier">singleton_class</span>.<span class="ruby-identifier">__send__</span>(<span class="ruby-value">:ruby2_keywords</span>, <span class="ruby-identifier">ali</span>) <span class="ruby-keyword">if</span> <span class="ruby-constant">RUBY_VERSION</span> <span class="ruby-operator">&gt;=</span> <span class="ruby-string">&#39;2.7&#39;</span>
  <span class="ruby-identifier">ret</span>
<span class="ruby-keyword">end</span></pre>
                              </div>
                            </div>

                            <div class="aliases">
                              Also aliased as: <a href="SingleForwardable.html#method-i-def_delegator">def_delegator</a>
                            </div>

                          </div>

                  <div id="method-i-def_single_delegators" class="method-detail ">
                            <div class="method-heading">
                              <span class="method-name">def_single_delegators</span><span
                                class="method-args">(accessor, *methods)</span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>Shortcut for defining multiple delegator methods, but with no provision for using a different name.  The following two code samples have the same effect:</p>

<pre class="ruby"><span class="ruby-identifier">def_delegators</span> <span class="ruby-value">:@records</span>, <span class="ruby-value">:size</span>, <span class="ruby-value">:&lt;&lt;</span>, <span class="ruby-value">:map</span>

<span class="ruby-identifier">def_delegator</span> <span class="ruby-value">:@records</span>, <span class="ruby-value">:size</span>
<span class="ruby-identifier">def_delegator</span> <span class="ruby-value">:@records</span>, <span class="ruby-value">:&lt;&lt;</span>
<span class="ruby-identifier">def_delegator</span> <span class="ruby-value">:@records</span>, <span class="ruby-value">:map</span>
</pre>

                              <div class="method-source-code" id="def_single_delegators-source">
            <pre><span class="ruby-comment"># File forwardable.rb, line 296</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">def_single_delegators</span>(<span class="ruby-identifier">accessor</span>, <span class="ruby-operator">*</span><span class="ruby-identifier">methods</span>)
  <span class="ruby-identifier">methods</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">method</span><span class="ruby-operator">|</span>
    <span class="ruby-keyword">next</span> <span class="ruby-keyword">if</span> <span class="ruby-regexp">/\A__(?:send|id)__\z/</span> <span class="ruby-operator">=~</span> <span class="ruby-identifier">method</span>
    <span class="ruby-identifier">def_single_delegator</span>(<span class="ruby-identifier">accessor</span>, <span class="ruby-identifier">method</span>)
  <span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
                              </div>
                            </div>

                            <div class="aliases">
                              Also aliased as: <a href="SingleForwardable.html#method-i-def_delegators">def_delegators</a>
                            </div>

                          </div>

                  <div id="method-i-delegate" class="method-detail method-alias">
                      <div class="method-heading">
                        <span class="method-callseq">
                          delegate method &rarr; accessor
                              </span>
                            </div>
                      <div class="method-heading">
                        <span class="method-callseq">
                          delegate [method, method, ...] &rarr; accessor
                              </span>
                            </div>

                            <div class="method-description">
                              

                            </div>


                            <div class="aliases">
                              Alias for: <a href="SingleForwardable.html#method-i-single_delegate">single_delegate</a>
                            </div>
                          </div>

                  <div id="method-i-single_delegate" class="method-detail ">
                            <div class="method-heading">
                              <span class="method-name">single_delegate</span><span
                                class="method-args"> [method, method, ...] =&gt; accessor</span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>Takes a hash as its argument.  The key is a symbol or an array of symbols.  These symbols correspond to method names.  The value is the accessor to which the methods will be delegated.</p>

                              <div class="method-source-code" id="single_delegate-source">
            <pre><span class="ruby-comment"># File forwardable.rb, line 275</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">single_delegate</span>(<span class="ruby-identifier">hash</span>)
  <span class="ruby-identifier">hash</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">methods</span>, <span class="ruby-identifier">accessor</span><span class="ruby-operator">|</span>
    <span class="ruby-keyword">unless</span> <span class="ruby-keyword">defined?</span>(<span class="ruby-identifier">methods</span>.<span class="ruby-identifier">each</span>)
      <span class="ruby-identifier">def_single_delegator</span>(<span class="ruby-identifier">accessor</span>, <span class="ruby-identifier">methods</span>)
    <span class="ruby-keyword">else</span>
      <span class="ruby-identifier">methods</span>.<span class="ruby-identifier">each</span> {<span class="ruby-operator">|</span><span class="ruby-identifier">method</span><span class="ruby-operator">|</span> <span class="ruby-identifier">def_single_delegator</span>(<span class="ruby-identifier">accessor</span>, <span class="ruby-identifier">method</span>)}
    <span class="ruby-keyword">end</span>
  <span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
                              </div>
                            </div>

                            <div class="aliases">
                              Also aliased as: <a href="SingleForwardable.html#method-i-delegate">delegate</a>
                            </div>

                          </div>

                          </section>

              </section>
              </main>



            </div>  <!--  class='wrapper hdiv' -->


<footer id="validator-badges" role="contentinfo">
<p><a href="https://validator.w3.org/check/referer">Validate</a></p>
<p>Generated by <a href="https://ruby.github.io/rdoc/">RDoc</a> 6.4.0.</p>
<p>Based on <a href="https://github.com/ged/darkfish/">Darkfish</a> by <a href="http://deveiate.org">Michael Granger</a>.</p>

  
    <p><p><a href="https://ruby-doc.org">Ruby-doc.org</a> is a service of <a href="https://jamesbritt.com">James Britt</a> and <a href="https://neurogami.com">Neurogami</a>, purveyors of fine <a href='https://jamesbritt.bandcamp.com/'>dance noise</a></p>
</p>
  
  </footer>

<script type="text/javascript">


  let ads  = $("#carbonads-container").children().detach();


  function swapMode() {
    var cookieName = 'darkmode';
    var cssDarkmode = Cookies.get(cookieName);
    console.log("***** swapMode! " + cssDarkmode + " *****");


    if (cssDarkmode == "true") {
      console.log("We have dark mode, set the css to light ...");
      $('#rdoccss').attr("href", defaultModeCssHref);
      $('#cssSelect').text("Dark mode");
      cssDarkmode = "false";
      console.log("swapMode! Now set cookie to " + cssDarkmode);
      Cookies.set(cookieName, cssDarkmode);

    } else {
      console.log("We not have dark mode, set the css to dark ...");
      $('#rdoccss').attr("href", darkModeCsseHref);
      $('#cssSelect').text("Light mode");
      cssDarkmode = "true";
      console.log("swapMode! Now set cookie to " + cssDarkmode);
      Cookies.set(cookieName, cssDarkmode);

    }

    console.log("  --------------- ");
  }


const vueCssApp = new Vue({
el: '#menubar',
data: {
isDark: false
},
methods: {
toggleClass: function(event){
this.isDark = !this.isDark;
}
}
})

const vueApp = new Vue({
el: '#vapp',
data: { 
isOpen: true
},

mounted() {
this.handleResize();
this.manage_mob_classes();
window.addEventListener('resize', this.handleResize)
//this.isOpen !=  (/Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent));
},
destroyed() {
window.removeEventListener('resize', this.handleResize)
},
created() {
//manage_mob_classes();
},

methods : {
isMobile() {
  return (/Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent));
},

  handleResize() {
    if (!this.isMobile()) {
      this.isOpen = window.innerWidth > 800;
    }
  },

  manage_mob_classes() {
    if (/Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)) {
      $("nav").addClass("mob_nav");
      $("main").addClass("mob_main");
      $("#extraz").addClass("mob_extraz");
      $("#carbonads-container").addClass("mob_carbonads-container");
      this.isOpen  = false;
    } else {
      $("nav").removeClass("mob_nav") 
        $("main").removeClass("mob_main");
      $("#extraz").removeClass("mob_extraz");
      $("#carbonads-container").removeClass("mob_carbonads-container");
      this.isOpen  = true;
    }
  },

  toggleNav() {
    this.isOpen =! this.isOpen ;
    // alert("Toggle nav!");
    console.log("toggleNav() click: " + this.isOpen );
  }
}
})

$("#carbonads-container").append(ads);


$(function() {

    var darkmode = Cookies.get("darkmode");
    console.log("Document ready: " + darkmode);

    if ( darkmode  == "true" ) {
      $('#cssSelect').text("Light mode");
    } else {
      $('#cssSelect').text("Dark mode");
     }

    $('body').css('display','block');
    });

</script>

    
  </body> 
</html>

